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I very much appreciate the audio manufacturers who (constructively) engage with ASR members.
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Nord MP NC252 SE Amplifier Review
- Thread starter amirm
- Start date
I very much appreciate the audio manufacturers who (constructively) engage with ASR members.
Waxx
Major Contributor
I know this board can do a lot better, i've seen it used in a diy amp that gets an 96dB Sinad and both channels are exact the same. He did not mod the board, just put it in a custom case with connectors and a power switch. The owner, an electronic engineer tested his build with an APx555 like Amir has (from his job). But he took care about the routing of the cabling and tested the board before the build (and would have sent it back if it did not meet spec or had faults). Here clearly something went wrong, or a bad board (that nord should have tested and reject) or the cabling is routed back and causes extra noise.
SINAD 5W = 95.39dB. Both channels are almost same. And due to large effective heatsink (not only a cosmetic feature) the continuous power is high.
Just made me appreciate my amps without input switches, only direct XLR inputs. Less mechanical points of failure.
Now curious to see Amir test an NCx252MP based amp to see how the new modules improved.
Now curious to see Amir test an NCx252MP based amp to see how the new modules improved.
More like $400... in a hobby filled with equipment costing tens of thousands of dollars, I am not sure why you would get a good amplifier when you can get a great amplifier for the cost of a nice dinner or two.
You keep assuming everyone in the hobby is filthy rich. A profoundly false assumption.
Also, when we're staying scientific here, the audible difference between a 500 and 1000 moneys Hypex amp is close to absolute zero. So much for "good" versus "great".
The big service forums like these are doing the hobby in the first place is proving beyond reasonable doubt that great, even end-game sound doesn't cost tens of thousands of dollars.
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Although I am staying quiet at the moment as far as the forum goes, I can assure all we are still investigating and talking with Amir directly for now (owner of the amplifier is also aware of our discussions).
daniboun
Major Contributor
Ah, a French car! Dacia is the low-cost Renault that works very well here.
Angry Romanian noises
daniboun
Major Contributor
Silent Roman flatulence
PristineSound
Major Contributor
Some manufacturers reported here on ASR that these Hypex all in one plate are the reason why they are unreliable.
daniboun
Major Contributor
I don't find this argument convincing. Amplifiers with an integrated PSU are simply more difficult to repair if they fail. Reliability is more related to the quality of design (components, engineering, heat dissipation, etc.)
2.5 milliohm is absolutely unrealistic, if you take into account any wire length. 20 cm of Cu wire pair of 1 mm2 cross section (40 cm total length) would have 8 milliohm resistance. Add contact resistance and you are there. All that race for milliohm output impedance is again a nonsense. Damping factor above 50 or so has no audible effect, other than audiophile fairy tales.
@Tone :
I made some comparisons between L and R channels on my NC252MP implementation a 5W/8ohm/1kHz. My results and conclusions: Right channel is slightly better than the left one regarding both distortion and level of mains induced spuriae. This may result from physical proximity of board components to the SMPS section.
I made some comparisons between L and R channels on my NC252MP implementation a 5W/8ohm/1kHz. My results and conclusions: Right channel is slightly better than the left one regarding both distortion and level of mains induced spuriae. This may result from physical proximity of board components to the SMPS section.
At higher power, namely 40W/8ohm, the result seems to be consistently similar.
One channel is better (though not significantly) than the other one. If it is the left one or the right one may be a question of wiring inside the amp case.
One channel is better (though not significantly) than the other one. If it is the left one or the right one may be a question of wiring inside the amp case.
Is this a standard layout used by nord for all ncore hypex stereo amps.
Ie. Nc122, nc252, nc502.
Would it make sense to order the budget case value line option instead.
There is no rca/xlr switch to be a potential problem.
It would be barebones as it gets.
And for those who cannot get their unit measured, it would provide peace of mind for the problems not being audible to the listener.
How about the channel imbalance tolerance issue. Is hypex aware of it. Have many been returned to them.
Ie. Nc122, nc252, nc502.
Would it make sense to order the budget case value line option instead.
There is no rca/xlr switch to be a potential problem.
It would be barebones as it gets.
And for those who cannot get their unit measured, it would provide peace of mind for the problems not being audible to the listener.
How about the channel imbalance tolerance issue. Is hypex aware of it. Have many been returned to them.
Gain balance is excellent, see the post above. Some distortion and noise imbalance is inevitable due to the all-in-one on-board concept. However the difference is unimportant.
JSmith
Master Contributor
Yet we didn't see as much variation as your tests (even though minor) and nowhere near as much as Amir measured in this review, compared to;
Buckeye NC252MP Stereo Amplifier Review
This is a review and detailed measurements of the Buckeye NC252MP balanced stereo class D amplifier. It was kindly drop shipped to me by a member and costs US $575. The amp is almost the size of a loaf of bread and literally weighs nearly as much! Amazing how far amplification technology has...
www.audiosciencereview.com
Review and Measurements of IOM NCore Pro PWR Amp
This is a review and detailed measurements of the IOM NCore Pro, Hypex NC252MP class-d based stereo power amplifier. It was kindly purchased by a member and drop shipped to me. It costs €669 from the company website. The IOM Ncore Pro comes in very compact and solid enclosure: The on/off...
www.audiosciencereview.com
JSmith
Conceptually it would make some sense that proximity to psu section affects measurements slightly (or pcb signal routing).
In our amplifier builds
Right = CH1 (closer to psu)
Left = CH2
For this theory to apply pma, presumably you use the reverse?
In any case the channel differences pma measures on his build is insignificant with overall excellent results.
Nobody should question the reliability of these modules, or the sound quality. Implementation is the key.
Why our amplifier measured worse will be revealed when we know for sure, rather than speculating.
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